Machine for making block paper bags.



A. HENDERSON MACHINE FOR MAKING BLOCK PAPER BAGS.

APPLICATION FILED FEB. 16,1905 95%0750 Patented Mai, 15, 1910.

15 SHEETS-SHEET 1.

ANDREW a GRAPAMYCO. Fnmmumocruwlans. wAsmNGmN, o c.

A. HENDERSON. MAGHINE FOR MAKING BLOOK PAPER BAGS.

APPLICATION FILED IBB..16, 1905.

Patented Mar. 15, 1910;

15 SHEETS-SEEET 2.

fly-

Q 720 A you 5 me Q o o@% g g g 4:3 I 55 it? a I ANDREW E GRAHAM co.PHDYDMTHOGRAPHENS WASWNGTON- D-Q A. HENDERSON. MACHINE FOR MAKING BLOCKPAPER B AGS.

APPLICATION FILED PEB- 16,1905. 952 a? Patented Mar. 15, 1916.

15 SHEETS-SHEET 3.

ANDREW a GRAHAM ca. Pho'rc-uwocmphsns W-SHINGTDN, 0.1:

A. HENDERSON. MACHINE FOR MAKING BLOCK PAPER BAGS,

APPLIGATION FILED FEB. 16,1905. Patented Mar. 15, 1910.

15 SHEETS-SHEET 4.

ANDREW R GRMMA c0 PHOTO-LITNOGRAFNERS, WAsmNGwu. Bv c.

A. HENDERSON.

MACHINE FOR MAKING BLOCK PAPER BAGS.

APPLICATION FILED IEB.18,1905.

952,075 Patented Mar.15,1910.

1a SHEETS-SHEET 5.

O O O ANDREW B GRAHAM 00 Pwmuwocuwzns. wAsNWcrou, 0.:

API- IENDERSON. MAGHINHFOR MAKING BLOCK PAPER BAGS.

' APPLICATION FILED FEB. 16,1905. 952,075., Patented Mar. 15, 1910.

EETSSHEET B.

mm? km;

ANDREW & 63mm co. PHOYO LITHOGRAFHER$ WJSHlNGiUN, D4;

A. HENDERSON. MACHINE FOR MAKING BLOCK PAPER BAGS.

. APPLIOATION FILED FEB. 16,1905. 952,075, r Patented Mar. 15,1910.

15 SHEETS-SHEET 7.

ANDREW B. Gnm m co. M10704 IWOORAPNFRS WASHINGYON. ac

A. HENDERSON. MACHINE FOR MAKING BLOCK PAPER BAGS.

APPLICATION FILED FEB. 16, 1906. I 95%,G75 Patented Mar. 15, 1910.

I 15 SHEETS-SHEET 8.

r I]. #9 G A. HENDERSON.

MACHINE FOR MAKING BLOCK PAPER BAGS; APPLICATION FILED FEB. 16,1905.

952,075 Patented Mar.15,1910.

Fay/6. G O

A. HENDERSON.

MACHINE FOR MAKING BLOCK PAPER BAGS.

APPLIGATION FILED FBB.16,1905.

Patented Mar. 15, 1910.

15 SHEETS-SHEET 10.

mg. m

r7 19. '82- mm Em:

A. HENDERSON. MACHINE FOR MAKING BLOCK PAPER BAGS Patented Mar. 15,1910.

APPLICATION FILED FEB. 16 952,075.

15 SHEETS-SHEET 11.

auansw a. mum co wuom-muosmvnsns, msmucwm D 9 A. HENDERSON.

MACHINE FOR MAKING BLOCK PAPER BAGS. APPLIOATION FILED FEB. 16,1905.

952,75 Patented Mar. 15, 1910.

15 SHBETB-SHBET 12.

ANDREW B GRAHAM 00., PIOYO-UTHOGRAFHERS, wn snmsmra n c A. HENDERSON.

MAGHINE FOR MAKING BLOCK PAPER BAG S.

0 1 9 1 Km 1 R m d W n .mw a n ya APPLICATION FILED FEB. 16,1905. 952 0(5 3 1 T E E H s S T E E H S 5 1 ANDREW a cP- no. Pnurmuwoamwms mswmsmmac A. HENDERSON.

MAOHINE FOE MAKING BLOCK PAPER BAGS. APPLICATION FILED FEB. 16,1905.

952,675 Patented Mar.15,1910.

15 SHEETS-SHEET 14.

JM: M M%ZZW VM% fl mac/ld w munzw a GRAHAM c0 PHOTG-LITNUGRAPHERSVIASMNGTGM. n c.

A. HENDERSON.

MAGHINE FOR MAKING BLOCK PAPER BAGS.

APPLICATION FILED PEB.16,1905.

952 075., Patented Mar. 15, 1910.

15 SHEETS-SHEET 15.

ANDREW av cmum cc. PNGTO-LITHOGRAPRERS. WASNYNGYON. u. c

ALEXANDER HENDERSON, F EDINBURGH, SCOTLAND.

MACHINE FOR MAKING BLOCK PAPER BAGS.

Specification of Letters Patent.

Patented Mar. 15, 1910.

Application filed February 16, 1905. Serial No. 245,931.

T 0 all whom it may concern:

Be it known that I, ALEXANDER HENDER- SON, a subject of the King of theUnited Kingdom of Great Britain and Ireland, and resident of 172 Easterroad, Edinburgh, in the county of Midlothian, Scotland, have inventednew and useful Improvements in Machines for Making Block Paper Bags, ofwhich the following is a specification.

This invention relates to a machine for making block paper bags and hasfor its objcct the construction of a machine which will form a blockpaper bag complete and ready for use from a flat sheet of material.

In carrying my invention into effect a pile of sheets of bag paper iscut to the required size and placed on a side table of my improvedmachine. By means of certain novel mechanisms employed the top sheet isdrawn off, folded into bag form, pasted, flattened and deliveredautomatically ready for use as will be hereinafter explained.

I will now describe my invention with reference to the accompanyingdrawings and then point out the novel features more particularly in theannexed claims.

Figure 1 is a side elevation of one side of the machine. Fig. 1 is asectional elevation at right angles to Fig. 1, looking toward the rearof the machine. Fig. 1 is a perspective view of the table of the machineshowing the bag former, table, side creasers and end creaser. Fig. 1 isa detail of the pasting mechanism. Fig. 2 is a plan of the machine. Fig.3 is an elevation of the opposite side to that shown in Fig. 1. Fig. atis an end view looking from the front of the machine. Fig. 5 is an endView looking from the rear of the machine. Fig. 6 is an enlarged sideelevation of the block on which the bag is formed. Fig. 6" is anenlarged elevation of the bag former and carrier therefor, the bagformer being in collapsed condition. Fig. 6 is a detail of the formerremoved from its carrier, in distended con dition. Fig. 6 is a top viewof Fig. 6 Fig. 7 is an enlarged end elevation of the side creasers andoperating mechanism. Fig. 8 is a plan and edge View of the creasersshown in Fig. 7. Fig. 9 is an enlarged side elevation of a stop for thecut sheets of paper. Fig. 10 is an end view of a portion thereof. Fig.11 is an enlarged side elevation of the end creaser and extractor. Fig.12 is a plan thereof. Fig. 13 is an enlarged side elevation of the endgummer for the bag. Fig. 14: is a plan thereof. Fig. 15 is a viewlooking from left to right of Fig. 13. Fig. 16 is an enlarged plan viewof the mechanism for actuating the bag block. Fig. 17 is a sectional endelevation of the bag block and table. Fig. 18 is a side elevation of theadjustable sides for the bag machine. Fig. 19 is a plan thereof. Fig. 20is a side elevation of the cam levers and connections for operating theend creaser and extractor. Fig. 21 is a side elevation of the cam leversand connections for operating the side arm creasers. Fig. 22 is a sideelevation of the cam levers and connections for operating the endpaster. Fig. 23 is a side elevation of the cam levers and connectionsfor operating the paste roller for the end paster. Fig. 24 is a sideelevation of the cam levers and connections for operating the top andend creaser. Fig. 25 is a side elevation of the cam levers andconnections for operating the bottom end creaser. Fig. 26 is a sideelevation of the cam levers and connections for operating the paster forthe edge of the bag. Fig. 27 is a side elevation of the cam levers andconnections for operating the right hand end folder; the left hand endfolder being a duplicate thereof. Fig. 28 is a front elevation of themechanism for operating the right and left hand top folders. Figs. 29and 30 are a plan and end view respectively of the paster for the edgeof the bag paper. Fig. 31 shows a sheet which has undergone the firststage of the operation having its two sides turned up. Fig. 32 shows thesecond stage; namely folding down the top edges. Fig. 33 shows the thirdstage with one end of the bag closed with the side flaps still to bepasted. Fig. 34 shows the bag completed. Fig. 35 shows the bag partlycreased at the end and sides for convenience in packing purposes. Figs.36 to 38 are details hereinafter referred to.

The sheets from which the bags are to be formed are cut to the requiredsize and placed in a pile on a table arranged at one side of themachine; the sheets being drawn off, one at a time, by means of thehorizontal arm 1, Fig. 29, which has a reciprocating motion in the guide2, Fig. 5. This arm constitutes the pastor for the edge of the bag paperand as it is reciprocated it passes over the paste roller 3, Fig. 17 tothe nearest edge of the bag paper. One sheet of bag paper is then drawn011 to the table 4, Fig. 17, the paster receding therefrom to its normalposition, Fig. 5. The bag block 5 is now caused to descend on to thepaper and forces the paper and table 4 downward until the paper isconverted into the shape shown in Fig. 81; the top of the bag block 5being level with the top of the table 6. The bag paper is then caused tobe folded over as shown in Fig. 32 by means of the top folders 7 and S(Fig. 28) which are caused to advance toward each other until the topedge of the bag paper is properly folded over. These folders 7 and 8 areso arranged that the gummed edge of the bag paper is folded lastly. Uponthe completion of the operation of folders 7 and 8 the top creaser 9,Fig. 1, and bottom creaser 10, Fig. 25, descend and ascend respectivelyto fold in the ends of the bag as shown in Fig. 33; the end of the bagbeing pasted by means of the reciprocating end paster 11, Fig. 1, afterwhich the ends 12 and 18, Fig. 33, are turned inward by means of theright and left hand end folders 14, Fig. 27, which are actuatedsimultaneously and advance toward each other and then recede. The bag isnow complete and the collapsible block 5 is collapsed for the purpose ofallowing the bag to be creased at the two sides 14 and end 15, Fig. 35,for the purpose of packing. This is effected by means of the right andleft hand creasers 16 and 17 Fig. 8, and end creaser 18, Fig. 11, whichleaves the bag in a flattened state, the block 5 being in a line withthe reciprocating bag extractor 19 which extracts the bag from theblock, conveys it to the rear of the machine and deposits it in asuitable receptacle.

Various sizes of bags may be made with the same machine, that is to say,the bag table 6 and connections are horizontally and verticallyadjustable. The bag block 5 may also be adjusted according to the sizeof bag required.

To effect the actuation of the first movement of the machine that is,taking a sheet from off the pile, a rotary motion is imparted to the camshaft 20 (Figs. 2 and 26), by means of the spur pinion 21 and spur wheel22, driven by a belt on pulley 23. The rotation of the cam shaft 20causes the cam 20* to actuate the lever 24 which is pivoted on the shaft25; the forward end of the said lever 24 being connected to the rockingbracket 26 by means of the rod 27. Connected to the rocking bracket 26is a lever .28 which is connected at its upper end by means of the rod29 to the reciprocating paster 1. It will be observed that when the of28 to lever 24 is elevated by its cam a motion partial rotation isimparted to the lever and consequently a reciprocating motion the paster1.

\Vhen the reciprocating paster has with drawn a sheetfrom the pile andplaced it on the table 4, it is necessary to hold the ungummed edge ofthe paper so that the reciprocating paster 1 does not drag the sheetalong with it. This is effected by means of the arm 30, which is mountedon the shaft 31 carried by the brackets 32 which are bolted or otherwisesecured to the side creaser brackets 88, as shown in Fig. 1 and moreparticularly in Figs. 9 and 10. A motion of partial rotation is given tothe arm 30 by means of the rods 34 and 8.5; the rod 85 being pivoted at36 and actuated by the cam 37, Fig. 4. The timing of the reciprocatingpaster 1 and holder arm 30 is effected by the difference of the throw inthe cam.

As shown in Fig. 1 one of the sheets is taken from the pile of sheetsshown on the left hand side of this figure by means of the picking updevice 1, consisting of a bracket 1 which carries material for lickingup the gum at 1". The bracket 1 is carried by two arms 1 one at eachside of the slide 2, shown in Fig. 2, these arms being pivoted to theframe 2 which carries the reciprocating pick-up. Connected to thebracket 1 is a rod 1 which is governed and held in normal position bymeans of the spring 1 which is attached to the bracket 1 secured to thesliding frame 2; the other end of the spring being connected to the lugat 1 of the pivoted bracket 1, the said bracket having a lower lug 1 towhich the rod 1. is connected. The normal position of the paster bracket1 is such that it is clear of the gnmming roller and the table.

hen the reciprocating picking up and pasting device is moved in thedirection of the paper, the portion 1 of the bracket 1 is loweredtogether with the arms 1 by reason of a stop at 1 formed on the bracketl as shown in Fig. 1. The stop 1 sliding with the frame 2 engages withthe fixed stop 1 on the machine frame and the arrangement is such thatthe rod 1 is given a forward motion, whereby the bracket 1 is depressedso as to come into contact with the pasting roller 3; that is to say,the bracket 1 is given a motion of partial rotation to effect thelowering of the bracket 1 for the purpose stated. It will be observedthat this stop arrangement causes the paster 1 or picker-mp to engagewith. the paste roller 3 both when receding from the paper table andwhen advancing to take up another sheet of paper. Similarly bydepressing the bracket 1 the portion 1 comes in contact with a fixedstop forward of the back stop and causes the bracket to descend and pickup a sheet of paper.

the bracket to its normal position. The action of the picker-up is suchthat the paper is gummed, and lifted up, deposited on the table at andtaken from the bracket 1 of the picker-up by the arm 30. The sheet isnow in position on the table 4. and the collapsible block 5 is caused todescend by means of the cam 38 which actuates the lever 39, Fig. 5; thesaid lever having a rocking motion and being provided with a rod l0which is connected to a second rocking lever ll which rocks on the shaft4:2. The free end of the lever 41 is connected to the upright rod 143which is connected to the double lever 4.4.. The lever H: pivoted at toand is connect.- ed at its forward end to a rod 49 connected to the topof the block 5. The free end of the double lever at is provided with acounter balance T7 to compensate for the weight of the block The table.4: is supported on two rods 45 which are jointed to two pivoted leversr pivoted on the b 'acket t. These levers at are provided with counterweights t and the action of the block or former 5 is such that itdepresses the table by its pressure and as the block moves upward thetable follows it by reason of the presssure being relieved. When thelock descends to the level of the top of the table atthe top and bottomof the bag are folded over by the folders 7 and 8 which are operated bybell crank levers d8 and t9, the bell cranks being actuated by the cam50 through the medium of rod 51, lever 52 and link 53. A. backward andforward motion is given to the rod 51 by means of the cam 50; the freeend of the rod being connected to one end of lever 52 by means of thelink 5 The other end of the lever 52 is secured to the shaft 54: onwhich the bell crank lever 4-9 is mounted. The shorter arms 49* of thebell crank lever i9 is connected to another lever by means of the link56, the lever 55 being pivoted at 57. The forward end 58 of th lever isadapted to engage with the underside of the smaller arm of the bellcrank lever t8 and the arrangement such that the lever governs themotion of the bell crank lever 48.

The folders 7 and 8 are inclined to be closed under the influence of thespiral springs 59 and (50. As the lever "2 is drawn to the right, thefolder 8 is traversed to the left whereby the connecting rod 56 of thelever 55 causes the portion 58 of the lever to descend and the folder 7is closed by means of the bell crank lever 48 under the influence of thespial spring 59, the rod 61 being for the purpose of adjusting thetraverse by means of the lock nuts 62.

The top of the bag having been folded over the top of the bag block 5 bymeans of the folders T and 8, I effect the folding When released from 3in of the end of the bag by means of the top contact with the stop thespring 1 restores creaser 9, (Figs. 1 and 22f) and bottom creaser 10(Fig. 25). The cam 64 for operating the top creaser 9 is mounted on theshaft 65 which is at right angles to the shaft 20, a motion of rotationbeing imparted to the shaft 65 by means of the bevel gear wheels 66 and67. As a rotary motion is im parted to the cam 64: the lever 68 is givena rocking motion on the rocking shaft 69, the free end of the lever 68being connected to the rocking lever 70 by means of the rod '71, anotherlever 7 2 being connected to the free end of the lever 70. The top ofthe lever 72 is connected to the rocking lever 73. Mount ed on the sameshaft as the rocking lever 73 is a lever 7 6 which is connected to theslide 7 at of the top creaser 9 and the arrangement is such that whenthe cam operates the lever 68 the top creaser 9 descends and forms thetop end 77 of the bag, Fig. 33.

The bottom end creaser 10 as shown more particularly in Fig. 25, isoperated by the cam 78 mounted on the shaft 20, the cam engaging withthe rocking lever 79 which isconnected to the bell crank lever 80 bymeans of the rod 81. The bell crank lever 80 is pivoted at 82 andconnected by the link 83 of the bottom creaser 19 so that when a motionof rotation is given to the bell crank lever 80 a reciprocating motionis imparted to the bottom end creaser 10 whereby the bottom end flap84:, Fig. 83, is formed. The ends 77 and 84 of the bag are now gummed orpasted so as to receive the flaps 12 and 13, the cam 85 mounted on theshaft 65 actuating the bell crank rocking lever 86 the free end 87 ofthe said lever being connected to another lever 88 by means of the rod89. The top of the lever 88 is connected to the slide 90 of the endpaster 11 by means of the rod 91. As the lever 88 moves backward andforward it advances the end paster 11 to the ends 77 and 84: of the bagwhereby they are gummed or pasted. The face of the end paster 11 issupplied with paste by means of the roller 93 which rises and falls soas to clear the end paster 92.

Fig. 23 shows the arrangement for actuating the pasting roller 93. A cam9a is mounted on the shaft 65 for actuating the bell crank lever 95which is connected to the lever 99 by means of the rod 97, the lever 98being mounted on the shaft of the lever 96. The free end of the lever 98is connected to the slide 109 of the paste roller 93 so that as the camis rotated the slide 100 is caused to rise and fall carrying with it theroller 93.

To prevent the end of the paster 92 from adhering to the ends 77 and 84:of the bag as it recedes therefrom, I provide the small rod 101 mountedwithin the end paster 11. As the end paster recedes from the end of thebag the rod 101 is projected under the influence of the spiral spring102, (Figs. 13, 14c and The flaps 12 and .13 of the bag are turnedinward by means of the side folders 11, the cam 103 mounted on the shaft20 actuating the rocking lever 10-1, Fig. 27, the free end of the lever101 being connected to the lever 105 by means of link 106. Lever 105 ispivoted at 106* and oscillates the lever 107 which is connected to theside folder 1 1 by means of the rod 108. It will be seen that as the endfolders 11 advance toward each other they fold in flaps 12 and 13 asshown in Fig. 3 1. The block or former 5 consists of two plates,arranged one above the other and which are connected. to the twobracketed guides 118 and 120. The guides 118 and 120 are slidablymounted within the carrier frame 116 and are operated so as to advancetoward each other to collapse the block 5 and recede to distend theblock for forming the bag. The carrier frame 116 lowers and elevates theblock 5 which is retained in its expanded condition, as shown in Fig. 6by in ians of the support 5 This support when the bag former iscollapsed, is drawn toward the rear of the bag that is to say, clear ofthe back thereof, as shown in Fig. 6. by means of the cam actuated rod128. The carrier frame 116 operates in the frames 116, 116".

The forming of the bag is now complete and the block 5 ascends until itis in a line with the side creases 16 and 17 and end ere-.ser 18 when itis collapsed. The collapsing of the bag is effected by means of the cam109 which is mounted on the shaft 110; the shaft 110 receiving a rotarymotion by means of the spur wheels 111 and 112. The cam 109 effects therising and falling of the rod 113 which actuates the arm 11 1 pivoted onthe spindle 115 of the block frame 116. Mounted on the spindle 115 isthe double bell crank lever 117 which is connected to the guide 118 ofthe collapsible block 5 by means of the rod 119. This arrangement isduplicated on each side of the block frame 116. Another portion 119* ofthe bell crank lever is connected to the top guide 120 of thecollapsible block 5 by means of the rod 121; the remaining de pendingportion 122 of the bell crank lever being connected to the bell cranklever 123 by means of the rod 121, the bell crank lever 123 beingsimilarly connected to the guides 118 and 1.20 as described withreference to the bell crank lever 117, the object of the connectionsbeing to effect the forward end and rear end of the collapsing of thebag block simultaneously.

The lever 113 is provided with a stop 125 which engages with the arm 111and depresses it as the bag block ascends, whereby the ends of the bellcrank lever 117 are caused to ascend and descend respectively whichbrings the guides 118 and 120closer to each other. As the block frame116 and bag block 5 descend and the stop 125 is disengaged from the arm11 1, the counter balance weight 126 effects the opening of thecollapsible block 5.

To allow the bag block 5 being compressed. it is necessary-to cause thesupport 127 to slide to the rear of the machine. This 1 effect by meansof the lever 128, which is connected to the slide by means of the rod129, the lever 128 being pivoted on the shaft 130 and being providedwith the links 131, 132 which are connected to the rocking lever 133*pivoted on the shaft 134 so that as the rocking lever 133* is given anupward and downward motion the rod 128 is given a reciprocating motionthrough the medium of the links 131, 132 whereby the support 127 isdrawn to the rear of the block 5 after which the said block iscollapsed. The block 5 and carrier frame 116 are provided with a rod 135for the purpose of forming a support for the ends 77 and 8 1 of the bagwhen they are folded downward and up mrcl. This rod is adapted to beforced to the rear of the machine by means of the end creaser 18 againstthe influence of the spiral spring 136, the said spring always returningthe rod 135 to its normal position, shown in Figs. 1 and 6. The bagblock being new collapsed, the bag is creased alongeach side and at theend in a similar manner as shown in Fig. 35.

As shown in Figs. 7 and 8, the side arm creasers 16 and 17 are carriedin a position in a line with the center of the block 5 when collapsedand they are advanced toward the center of the block by means of thelever 137 which is connected to a bell crank lever 138 carried on theshafts 139, 1-1-0, shown more particularly in Fig. 1, the said shaftsbeing carried by the brackets 141 mounted on the top of the supportingplate 1-1-2. The lever 137 is connected to the upper end of the bellcrank lever 138 and to the lower end of the lever 143, a connectionbeing made from the lever 143 to the slide 14:1 at one side the lowerend of the lever 138 being connected to the slide 14% on the other side,a spiral spring 173 being employed to assist in returning the creasersto their normal position.

Supported from the slides 1 14 by means of the suspension rods 1%15 arethe creasers 16 and 17 The shaft 139 is rocked by means of the cam 1-16mounted on the shaft 65, Fig. 1 through the medium of the rocking lever1 17 connected to a rocking lever 1.1-8 by means of the link 149. Thefree end of the lever 14-8 is connected by the rod to the lever 151mounted in the shaft 139. By this arrangement the shaft 139 is partiallyrotated, the side creasers being advanced toward the center of the block5 whereby the sides of the bag are creased. Simultaneously with thecreasing of the sides the end of the bag is creased, the end creaser 18being advanced toward the end of the bag block. The end creaser 18 issupported in guides on the plate 142 and is capable of having a slidingmovement to and from the block 5.

As shown in Figs. 4 and 11, the slide 151 is carried on the plates 142and a reciprocating motion is given to the end creaser by means of thecam 152, Fig. 20, mounted on the shaft 165, the cam imparting a motionto the rocking lever 153 which is connected to the lever 154 by means ofthe rod 155. Mounted on the shaft 156 are two arms 157, 158, which areconnected to the side 151 by means of the rod 159 so that when motion isimparted to the lever 153 the end creaser 18 is caused to reciprocateand crease the end of the bag.

Simultaneously with the creasing of the end of the bag, it is withdrawnfrom the block 5 by means of the extractor clips 160, 161, which arecarried by the end creaser 18. The extractor clips 160, 161 are pivotedat 162 and their operation is governed by rods 163, 164, pivoted at- 165to the slide 166, Fig. 12. The slide is adapted to traverse back wardand forward and is held in its normal position, as shown in Figs. 11 and12, by means of the spiral springs 167, 168. The frame 169 of the endcreaser is provided with an abutment 17 0 adapted to engage the notchedarm 171. When the abutment 170 is out of engagement with the notch inthe arm 171 the springs 167, 168 carry forward the slide 166 and causethe rods 163, 164 to close the clips 160 and 161 on the top of theV-shaped end creaser; the bag intervening between the point of the clipsand the V-shaped end creaser. A backward motion is then given to theextractor which carries the bag toward the back of the machine until theabutment 170 is engaged by the stop 172, Fig. 1 by which it is forcedback to the position shown in Fig. 11 which has the effect of distendingthe springs 167, 168.

When making bags of various sizes it is necessary to alter the size .ofthe bag block 5; also to alter the level of the table 6. This I effectby carrying the table in the frame 174 which is capable of being movedup and down in the frame 175 by means of the worm 176 which is mountedon the stationary frame 175. The worm 176 meshes with a worm wheel 177which is mounted on the spindle 17 8 running across the machine. 011each end of the spindle 178 is mounted a cam 179 as shown in Fig. 3. Thecams 179 engage the radial portion 180 of the bracket 6 so that when theworm wheel 177 is partially rotated, the cam elevates the table 6. Bythis action a bag may be produced of less depth than the regular form;by lowering the table a bag of greater depth is produced. If a bag ofless depth is required, a bag block of less depth is applied to themachine, and'the bars 181, 182, Figs. 18 and 19 are adjusted equally atboth sides of the center of the bag block by means of the right and lefthand screw rod 183; the bar 182 being carried on the frame work 184 ofthe lower frame 185.

Figs. 1 and 4 show a hand wheel 186 for effecting the movement of theparts assembled within the frame work 175 of the machine. A frictionclutch 187 may be employed on the main driving shaft 20 of the machine(shown in Figs. 2 and 5) so that the machine may be stopped or set inmotion as desired by the operator by means of the clutch lever 188mounted at the front of the machine.

For the purpose of maintaining the pile of sheets of bag paper at agiven level, I may employ an automatic rising table 189 which iselevated by means of the revolving eccentric 190 and actuating dependingeccentric lever 191. Secured on the shaft 192 of the eccentric 190 is ahand wheel 193 which is given a motion of gradual rotation by means ofthe friction pawl 194 actuated by the rod 195 pivoted on the rockingshaft 184, the rod 195 receiving its motion through the medium of thecam 196 and lever 197. As the hand wheel 193 is rotated the eccentric190 elevates the rod 191 whereby the table 189 is elevated. The pivotedlever 198 and guide rod 199 are for the purpose of insuring a parallelmotion of the table 189.

In lieu of using two end folders such as 14 Fig. 27, I may employ ahinged flap folder 200 Fig. 37, the said folder being actuated by alever 201 which is pivoted to the folder at 202 and connected to the rod107 in a similar manner to that described with reference to Fig. 27.

Counter balances or spiral springs may be employed on any of the variousmotions for the purpose of returning the said motions to their normalpositions.

Having thus described my invention, the

following is what I claim as new therein and desire to secure by LettersPatent:

1. In a machine for making block paper bags, the combination of a frame,vertical guides supported on said frame, a vertically slidingcollapsible former mounted in said guides, a table having an opening andplatform for said former, means for gumming and conveying a sheet of bagpaper to said table, means for folding said paper over the former toform a square tube, means for folding the ends, elevating and collapsingsaid former, and means for extracting the bag from the former, as setforth.

2. In a machine for making block paper bags, the combination of a frame,vertical slides supported on said frame, a vertical

